Hello everyone,
I have a question regarding the vector group of a power transformer installed in the configuration shown in the attached diagram. Which option would be more appropriate for offshore power transformer, for such a setup – YNd1 or YNd11?
A brief description of the configuration (in case the diagram link expires):
Onshore, there is a 3-winding transformer 400/220/42 kV with a YNyn0d11 connection. A STATCOM is connected to the 42 kV winding, and the 220 kV winding is connected to the export cable. On the offshore substation, there is a 220/66 kV transformer with either a YNd1 or YNd11 connection. The wind turbine transformers are in a Dyn11 configuration.
Additional question:
Do YNd1 and YNd11 transformers differ significantly in construction, considering that in practice, it is possible to obtain the same phase shift from a YNd1 transformer as from a YNd11 transformer by swapping two phases?
I have a question regarding the vector group of a power transformer installed in the configuration shown in the attached diagram. Which option would be more appropriate for offshore power transformer, for such a setup – YNd1 or YNd11?
A brief description of the configuration (in case the diagram link expires):
Onshore, there is a 3-winding transformer 400/220/42 kV with a YNyn0d11 connection. A STATCOM is connected to the 42 kV winding, and the 220 kV winding is connected to the export cable. On the offshore substation, there is a 220/66 kV transformer with either a YNd1 or YNd11 connection. The wind turbine transformers are in a Dyn11 configuration.
Additional question:
Do YNd1 and YNd11 transformers differ significantly in construction, considering that in practice, it is possible to obtain the same phase shift from a YNd1 transformer as from a YNd11 transformer by swapping two phases?
